Patent RU-2615598-C1 (RU)
Inventor: KHRUSTALEV EVGENIJ NIKOLAEVICH
IPC: G01N3/12
Filed: 2015-11-05
Granted: 2017-04-05
Abstract: FIELD: physics. 
     SUBSTANCE: method 1 for determining the physical parameters of the material medium strength by the flat rigid stamp is establishing patterns in the laboratory shift, such as unbroken soil and peat at the angle compression conditions   of the internal friction and specific medium cohesion A=A str  by plotting Mohr-Coulomb   of the limited medium state under pressure p i,  where τ i  - is the medium shear tension under the compressing pressure p i , determining the calculated specific medium weight of the unbroken and broken structure   and   , its calculated angle of the internal friction with the broken structure   , the calculated domestic pressure   ,   at the depth h, determining the adjusted value of: 1) the specific adhesion of the immersed medium   ,   , the gravity pressure   ,   , the specific weight   at   , r b >0 and the absence of the atmosphere pressure; 2) the specific medium adhesion   with the specified values   ,   ,   ,   - at   , r b =0 and the access of the atmosphere pressure P atm =1.033 (kg/cm 2 ); 3) the specific medium adhesion   ,   , and updating the values of the specific medium weight   ,   and updating the value of the specific medium weight   ,   and the gravity pressure   ,   r b <0 and the access of the atmosphere pressure P atm =1.033 (kg/cm 2 ). The method 2 for determining the physical parameters of the material medium strength by the spherical stamp, involves loading the dry medium with force F of the diameter D with measuring the current slump S t  until its stabilization time t, unloading the sphere, determining its contact slump S o  and regarding the test results - a continuous adhesion A con , the sphere is immersed in the medium, at least, three times through the torque resilient element to the predetermined depth S t1 <S t2 <S tk , the value of which is maintained constant in the stabilization time t of the corresponding efforts P 1 , P 2 , P k , then the sphere is unloaded by measuring the stamp diameter with the diameter d k . Next, the sphere slump   is calculated at the pressures p med =P k /[πS o (D-S o )], the chart S=(S t -S o )=ƒ(p med ) and the tangent lines to the chart points are plotted corresponding to the efforts P 1 , P 2 , P k  till the intersection with the x-axis; the Mohr circles are built and the tangent straight line (maxτ str. )=p med. ⋅tgθ+C e  is led to the intersection with the x- and y-axes with the radius equal to the difference values of the p med  and their corresponding intersection values of the tangent with the x-axis limit angle θ of the internal soil friction is removed from the chart (maxτ str )=ƒ(p med ) and the instantaneous equivalent clutch C e  is measured, the angle of the internal medium friction in the structured condition   and specific cohesion   are calculated, a semicircle is conducted with the radius R o  from the chart coordinate beginning (max τ str )=ƒ(p med ), contacting it and shutting off a point at the x-axis corresponding to the limit tensile stress σ p =2R o =2C e ⋅cosθ/(1+sinθ), the value of which corresponds to the long cohesion   . Further, the increasing force P c >P k  is applied through the sphere to the medium till the stabilization of its limit value P m =const at registering its corresponding S m  medium slump , in which the sector angle of the sphere semicontact with the medium is   , where   , and the long cohesion value is defined to the frozen medium - like   , for the normal soil medium - like   , for the peat medium - like:   at cohesion   , and the angle of the medium internal friction is clarified like   . The value of the atmosphere pressure   is taken for the instant equivalent medium cohesion of soil and peat at the limit angle of the internal medium friction   , where   - the angle of the internal medium friction with the broken structure, the specific cohesion of the structured medium of peat and soil is defined like   and the value of the long cohesion - by the expression   at   , the structural cohesion is defined like   for the frozen and normal medium of soil and peat, and the equivalent adhesion like   . 
     EFFECT: increasing the degree of reliability and accuracy of determining the physical parameters of the material. 
     4 cl, 6 dwg